This is a badge-type radio specifically for Suzuka Voice FM, purchased for 3960 yen when attending the Suzuka Circuit F1 race. It is unused because I didn't know that the in-stadium radio broadcast was available in the grandstand seats. The following is quoted from the official website: A must-have for race viewing. A new design for the Suzuka Voice FM badge radio, which allows you to clearly enjoy the in-stadium commentary during big races at Suzuka Circuit! Includes earphones and a USB charging cable. Size: 60mm diameter / 12mm thickness Continuous operating time: Approximately 10 hours It's light and compact, so you can clip it to your chest pocket or bag.